Ammeter
Anemometer
Altimeter
Audiometer
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Answer is Wrong!
The correct answer is B. Anemometer.
An anemometer is an instrument used for measuring wind speed and direction. It is a common weather instrument and is also used in many industrial applications. There are many different types of anemometers, but the most common type is the cup anemometer. Cup anemometers have three or four cups that are mounted on a vertical shaft. As the wind blows, the cups rotate around the shaft. The rotation of the cups is then used to measure the wind speed.
Ammeters are used to measure electric current. Altimeters are used to measure altitude. Audiometers are used to measure hearing loss.